The Marvel studios production has already pulled in more than $100m around the world despite a delayed bow in the US, where it will open this weekend. Critics have praised Branagh's skill in transforming a lesser-known superhero into the star of what looks likely to be one of the year's biggest blockbusters.

Speaking to Entertainment Weekly, Branagh said: "I am not sure I am done with Thor's universe, or if it is done with me." However, he said he had not yet started thinking about ideas for a second film. "You can think of stuff for two or three later, if you get the chance to do them," he said. "But you won't if one isn't good enough."

Marvel's Kevin Feige said last month that a second Thor film is being planned, with Australian Chris Hemsworth set to reprise the lead. In the meantime, the god of thunder will appear in the Joss Whedon-directed ensemble superhero movie The Avengers, alongside Captain America, Iron Man and The Hulk, next year. His brother Loki, played by Tom Hiddleston, was recently confirmed as one of the main villains of that movie by the British actor himself.